<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>样式的重叠性</title>
    <style>
       div{
           font-size: 20px;
           color: blue;
       }

       /* 以最后加载的样式为准 */
       div{
           color: red;
       }
    </style>
</head>
<body>
    <div>
        样式的重叠性
    </div>
</body>
</html>